I'm in my 50s and about 3 diopters farsighted. I had trouble getting a good prescription for screen glasses. My optometrist insisted that +1.25 was the right correction for desktop screens, but it gave me eye strain. I like my screen a little closer, or else my corneas are extra-stiff. Anyway, I tried a few versions and found that +1.75 was better for my desk setup.
Tip: Zenni.com lets you order pairs with custom corrections in 0.25 diopter increments for under $100 each, so you can try a few and find what feels best for several hours of screen time.
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